Superheater for steam-boilers.



' w, AGKROYD & 0. A. M. BUGKLEY. SUPBRHEATER FOR STEAM BOILERS. .PPLIUATloN FILED MAR. 17. 1908.

2 SHEETS-SHEET 1.

Fig. '1

. V 4 10 m l I M v I" 2 g m PATENTED JULY 28, 1908.

No. 894,566. PATENTED JULY 28, 1908. W. ACKROYD & G. A. M. BUOKLEY.

' SUPERHEATBR FOR STEAM BOILERS.

APPLICATION F'ILEDMAR. 17. 1908.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE,

WILLIAM AOKROYD, OF WORTLEY, LEEDS, AND GROSSLEY ANDERSON MONTGOMMERY BUCKLEY, OF BATLEY, NEAR LEEDS, ENGLAND.

SUBERHEATER FOR STEAM-BOILERS.

, Specification of Letters Patent.

Patented July 28, 1908.

Application filed March 17, 1908. Serial No. 421,608.

To all whom it may concern:

Be it known that we, WILLIAM AOKROYD, of Wortley, Leeds, and CRossLEY ANDERSON MONTGOMMERY BUOKLEY, of Batley, near Leeds, both in the county of York, England,

and both subjects of theKing of Great Brit ain, have invented a certain new and useful Improved Superheater for Steam-Boilers, and of which the following is a specification. This invention relates to an improved steam superheater, particularly adapted for use in connection with horizontal steam boilers commonly known as Lancashire boilers.

The superheater constructed according to this invention consists of a vertical box-like casing of semi-circular or other convenient shape in plan, said casing being fitted up to the back end of the boiler; and to one end of the casing, at its upper part, is attached a steam pipe from the boiler, while to the other end of the casing, at its upper part, is attached a steam delivery pipe. The casing is divided internally by means of division plates or walls so as to form a series of chambers or compartments which may be of a progressively increasing area from the inlet end of the casing toward its outlet end, which divertically, are alternate V cut' short top and bottom of the casing so that the steam is caused to pass down and up each alternate chamber in its course through the casing from the inlet end to theoutlet end. Such a box-like casing is arranged at the rear end of the boiler so that its ends abut against the rear end of the said boiler, and so a chamber is formed with which the boiler flues c0mmu-- nicate and the products of combustion pass through and into the chamber and find their exit by an under-flue, the top and base of the chamber formed by this box-like casing being closed. We have found that a su erheater of this descriptionis economica in construction and very efficient in use.

Our invention is described with reference to the accompanying drawings.

Figures 1 and 2 are respectively a sectional side elevation and a part sectional plan, of a Lancashire boiler fitted with a steam superheater in accordance with-our invention; and Figs. 3 and 4 are respectively a part sectional front elevation and a sectional plan, of the superheater detached and drawn to an enlarged scale.

In the drawings, the superheater consists of a vertical box-like casing 1, of semi-circular sha e in plan, fitted up to the back end of the boi er 2 in the manner and in lieu of the usual flue dividing walls; and to one end of the casing 1, at its upper art, is attached a steam pipe 3 from the boi er 2, while to the other end of the casing 1, at its upper part, is attached a steam delivery pipe 4. The casing 1 is divided internally by means of division plates 5 into a series of vertically arranged chambers or compartments 6. The division plates 5 are alternately cut short top and bottom of the casing 1 so that the steam .entering by way of the pipe 3 is caused to pass down and'up in the alternate chambers 6 of the casing 1 in its course to the outlet p t will be seen that in employing the above form of steam superheater, the great heat from the boiler fiues 7 is caused to play directly on to and over the entire interior surface of the said superheater, which latter then acts to divert the heat along the central under flue 8 of the boiler; and further, that the heat passing along the side flues 9 of the boiler to the outlet flue 1.0 is caused to play directly on the exterior surface of the said su erheater, whereby the steam passing througl i the latter is quickly superheated, while a definite circulation of the steam is set up by the superheater on account of its particular internal construction.

In case any water should be formed inthe superheater, we could make holes at the bases of the division plates 5 within the easing 1 so as to allow the water to drain to one end of the latter, and then conduct the water away from the end of the casing 1 byan outlet coupled up say by means of a pipe to a convenient receptacle or receiver.

What we claim as our invention and desire to secure by patent is 1. In superheaters for steam boilers; the combination with a steam boiler, a furnace for heating same, and flues for conducting the roducts of combustion; of a vertical boxlike casing located at the rear of said boiler, the vertical ends of said casing abutting upon the rear end of said boiler said casing being shaped in plan to form a chamber between the inner wall of said casing and the rear end of said boiler, into which chamber said fines of said boiler open, vertical division plates located in said casing, one of said division plates not reaching the top of said casing and the next division plate not reaching the bottom of said casing to provide a circuitous path for steam within the said casing, a pipe from said boiler communicating with the top of said casing at one of the ends of said casing abutting upon the rear of the boiler to conduct steam thereto, and a steam delivery pipe communicating with the top of said casing at the opposite end thereof to convey away the superheated steam substantially as set forth.

2. In superheaters for steam boilers; the combination with a steam boiler, a furnace for heating same and fines for conducting the products of combustion; of a vertical boxlike casing located at the rear of said boiler, the ends of said casing abutting upon the rear end of said boiler, said casing being shaped in plan to form a chamber between the inner wall of said casing and the rear end of said boiler into which chamber said flues of said boiler enter, vertical division plates located in said casing one of said division plates not reaching to the top of said casing and the neXt division plate not reaching to the bottom of said casing, a pipe from said boiler communicating with the top of said casing at one end thereof to conduct steam from said boiler thereto, and a steam delivery pipe communicating with the top of said casing at the opposite end thereof to convey away the superheated steam, the distance between said division plates in said casing being less at that end into which the supply pipe enters and progressively increasing in distance apart towards the delivery end of said casing, substantially as set forth.

3. In superheaters for steam boilers; the combination with a horizontal steam boiler, a.furnace at the front end of same, boiler flues passing through said boiler and opening at the rear end, a flue passing centrally beneath said boiler from'the rear to near the front end, and side flues communicating with said under-central flue; of a vertical box-like casing located at the rear end of said boiler, the vertical ends of said casing abutting upon the rear end of said boiler and said casing be ing shaped in plan to form a chamber between the inner wall of said casing and the rear end of said boiler, means for closing the upper and lower ends of said chamber, into which latter said boiler flue and said central under-flue open, a steam supply pipe from said boiler communicating with the top of said casing at one end thereof, and a steam delivery pipe communicating with the top of said casing at the opposite end thereof, vertical division plates in said casing to form circuitous passage for the steam within said easing from the supply to the delivery pipes aforesaid, substantially as set forth.

4. In superheaters for steam boilers; the combination with a horizontal steam boiler, a furnace at the front end of same, boiler flues passing through said boiler and. opening at the rear end to conduct the prodiieis of combustion from said furnace, a tin e passing centrally beneath said boiler from the rear end to near the front end. thereof, side Hues communicating with the forward end of said under-central flue, and an outlet tlue with which the forward ends of said side llues communicate; of a vertical box-like -asing located at the rear end of said boiler, the vertical ends of said casing abutting upon the rear end of said boiler, said :asing being semi-circular in plan to form a chamber between the inner wall of said casing and the rear end of said boiler, means for closing the u per and lower ends of said chamber with w iich latter the boiler ilues and the undercentral flue communicate, a steam supply pipe from said boiler comnmnimting with the top of said casing at one end thereof, and a steam delivery pipe commun' *ating with the top of said casing at the opposite end thereof, vertical division plates located in said casing, one of said division plates not reaching to the top of said casing and the next division plate not reaching to the bottom of said casing, the distance between said division plates in said casing being less at that end into which the supply pipe enters and progressively increasing in distance apart towards the delivery end of said casing substantially as set forth.

. WILLIAM ACKROYD.

CROSSLEY ANDERSON lllON'ltlOMMllllY BUCKLEY.

Witnesses:

JoI-IN JowETT, VANCE E. GALLowAY. 

